7H38L high‑speed dc automotive fuse | 300A‑400A 750V‑800V DC gR Fuse
7H38L high‑speed dc automotive fuse is gR full‑range EV dc fuse for charging pile,on‑board battery and inverter. Rated 300‑400A 750‑800V DC with 20kA DC interrupting capacity,ISO8820‑8 JASO D622 UL248‑20 compliant,custom specs available.
7H38L high‑speed dc automotive fuse is gR full‑range fast‑acting high‑voltage DC fuse for new‑energy charging pile,charger,on‑board battery,vehicle‑mounted circuit system and inverter comprehensive over‑current & short‑circuit protection. This series covers rated current 300A‑400A at 750V / 800V DC with 20kA DC breaking capacity. It adopts high‑temperature‑resistant ceramic tube,99.99% pure‑silver variable‑cross‑section melt and high‑purity quartz‑sand arc‑extinguishing medium. Silver‑plated contact surfaces reduce temperature rise and power consumption. The unit withstands thermal shock,mechanical vibration shock,current impulse and chemical load. Custom time‑current performance characteristics are negotiable for special‑project demands.
| Series Model | 7H38L High‑Speed DC Automotive Fuse |
| Fuse Category | gR Full‑range fast‑acting fuse |
| Rated DC Voltage | 750V / 800V DC |
| Rated Current Range | 300A‑400A |
| Interrupting Breaking Capacity DC | 20 kA DC |
| Material & Structure | High‑temp ceramic housing;99.99% pure‑silver variable‑section melt;quartz‑sand arc‑extinguishing medium;silver‑plated contact surface |
| Compliance Standards | ISO8820‑8, JASO D622, GB/T31465.6, UL248‑20 |
| Normal Operating Temp | ‑5 °C ~ +40 °C |
| Allowable Extreme Temp | ‑40 °C ~ +125 °C |
| Typical Applications | Charging pile,charger,on‑board battery,vehicle‑mounted circuit,inverter new‑energy‑vehicle high‑voltage DC‑circuit comprehensive protection |
| Customization Support | Custom agreed time‑current characteristics available upon negotiation |
| Part Number | Rated Current(A) | Rated DC Voltage(V) | Max Voltage Drop(mV) | DC Breaking Capacity(kA) |
|---|---|---|---|---|
| 7H38L300 | 300 | 750/800 | 45 | 20 |
| 7H38L350 | 350 | 750/800 | 42 | 20 |
| 7H38L400 | 400 | 750/800 | 42 | 20 |
Frequently Asked Questions
Q: What fuse category is 7H38L high‑speed dc automotive fuse?
A: 7H38L is gR full‑range fast‑acting fuse, provides both overload and short‑circuit high‑voltage DC protection for charging pile and new‑energy‑vehicle circuits.
Q: What is DC breaking‑capacity for 7H38L series?
A: Rated DC interrupting capacity reaches 20kA for short‑circuit fault interruption for charging‑pile,EV battery and inverter high‑voltage DC‑systems.
Q: Where are 7H38L fuses applied?
A: Designed for charging pile,charger,on‑board battery,vehicle‑mounted wiring circuit and inverter comprehensive high‑voltage DC‑circuit protection of new‑energy vehicles.
Q: What temperature range can 7H38L withstand?
A: Normal ambient‑5 °C ~ +40 °C; allowable extreme operating temperature‑40 °C ~ +125 °C for harsh charging‑pile and automotive environment.
Q: Can we customize time‑current curve of 7H38L fuse?
A: Yes,custom‑made agreed time‑current performance can be negotiated for special‑purpose project requirements.
